Snow plow



Dec. 6, 1960 Filed Nov. 3, 1958 J. PEITL 2,962,821

SNOW PLOW 3 Sheets-Sheet 1 INVENTOR: JWSZ'F TL ATTORNEYS Dec. 6, 1960 J,n- 2,962,821

SNOW PLOW Filed Nov. 3, 1958 3 Sheets-Sheet .3

INVENTOR. JOSf F P67 7.4

BY w 5 [@W d/Mm United States 2,962,821 SNOW PLOW Josef Peitl, Vienna,Austria (Wienerstrasse 49, Klosterneuburg, Austria) Filed Nov. 3, 1958,SenNo. 771,635

Claims. (Cl. 37-42) I' This invention relates to improvements in snowplows and other road clearing devices and vehicles for travelling onsnowand on a roadway, and will" be described hereinafter with particularreference to a snow plow in which. the clearing edge of the plow shareis divided into's'everal sections, which are rearwardly displaceableagainst spring force in fiat guide pockets; the pockets for guiding thesections which form the clearing edge are connected to the plow frameand are reinforced at their front edges by a; steel rail, which isformed with slots which are aligned with. the pockets to provide apassage and guidance for the sections.

'This' steel rail is subject to heavy wear, particularly titthesldtedges. The entire steel rail must bereplaced iii' 'the case of repairs.

It is an object of the invention to provide a construction which is ofhigher strength than the known snow plows and can be serviced moreeasily. It is a special object so to design the guides for the sectionsforming the plow share that the latter will withstand also in' creasedstresses.

The essential feature of the invention resides in that the steel railcomprises I-shaped inserts which guide the edges of the sections andconsist of high-grade steel,

which inserts are connected by rail portions which form the slots andconsist of steel of lower strength.

Further details of the invention will be explained with reference to thedrawing, which illustrates an embodiment of the essential parts of asnow plow attached in front of a motor vehicle, for being pushed therebyin order to clear snow.

Fig. 1 is a plan view showing the snow plow. Fig. 2 is a rear viewthereof. Fig. 3 is a sectional view taken on line III-III of Fig. 2.Fig. 4 is a sectional view taken on line IV-IV of Fig. 6. Fig. 5 is asectional view taken on line V--V of Fig. 6. Fig. 6 is a sectional viewtaken on line VI-VI of Fig. 4 Fig. 7 is a sectional view taken on lineVII-VII of Fig. 4 or 5. Fig. 8 is a perspective view of the detail ofFigs. 4 to 7. Figs. 4 to 8 are enlarged relative to Figs. 1 to 3. Fig. 9shows a detail in a further enlarged perspective view.

The snow plow 1 comprises a shareplate 2, which is forwardly concavelycurved and inclined to the working direction of the plow; suitably theshareplate increases laterally in width and height. The clearing edgeproper is formed by blade sections 3, which slide in guide pocketmembers 4 and are urged forwardly by springs 5. A slipping of thesections 3 out of the guide pocket members 4 is prevented, e.g., byscrews, which are screwed into the rear ends of the sections and engagethe also reinforced rear rim of the pocket. The bladelike sections 3extend either parallel to the working direction when seen in a top planview, as is shown in the drawing, or may extend at an acute angle to theworking direction. The front rim of these pocket members 4 isparticularly highly stressed because the blade-like 2,962,821 PatentedDec. 6, 1960 sections 3: will not always slide back in the pocketmembers 4 parallel to themselves but will be subjected to changingbending stresses which are upwardly directed if the snow plow 1 isforced downwardly against the road surface to be cleared and downwardlyin normal operatibnwhen: a section strikes a fixed obstacle. To be ableto take up these stresses the front rim of the pocket members 4 isreinforced by a steel rail 6, which extends throughout the length of theplow share. This steel rail comprises the end portions 25, the inserts25 and the intermediate rail portions 26, 27. The steel rail 6. hassuitably a trapezoidal shape in cross-section. The. steel rail. 6 isformed with appropriate slots '7 in alignment with the pocket members 4to provide a passage and guidance of the bladelike sections 3.

The share plate 2 is aifixed to substantially vertical rib plates 8,which form parts of the plow frame. The rib plates 8 are appropriatelyinter-connected by anglesection rails 9, 10 and 1-1 to provide for :ahigh strengthof the plow frame. Each of the angle-section rails 10 and11 has a plate 12 connected thereto and the two plates 12 are bracedagainst each other by a plate 13. The plate 13 carries centering pins17, which facilitate the connection to an appropriate counterplate 16,which is pivoted. by means of links 14 to a motor vehicle 18. The links14 are pivoted to a plate 19, which is connected to a plate 20 affixedto the motor vehicle 18. The plates 13 and 16 and the plates 19 and 20'are connected by screws 21. The underside of the snow plow iscovered bya supporting plate 15.

To support the plow 1, slide runners 22 are afiixed to the supportingplate 15. Rollers mounted above'these slide runners 22 extend downwardlythrough: openings in the runners so that the plow is moved only withrolling friction on the road surface.

During operation the bladelike sections 3 are continually pushed back inthe pocket members 4 and are pushed forward by the springs 5. Thismovement causes a high wear at the slots 7 of the steel rail 6 andparticularly at the surfaces in slidable engagement with the edges 24 ofthe sections 3. For this reason the invention provides I-shaped inserts25 of particularly highgrade steel in the steel rail 6. These inserts 25are interconnected, suitably by welding, by means of intermediate railportions 26, 27. The inserts 25 and the intermediate rail portions 26,27 have flat contact surfaces 28 and 29, respectively. The edges of theinserts 25, however, are beveled at 30 to define with the sharp edges ofthe intermediate rail portions 26, 27 wedgeshaped grooves foraccommodating welding seams 31. Channel-shaped end portions 25' areprovided at the lateral ends of the snow plow.

The inserts 25 and the end portions 25' are not only welded to theintermediate rail portions 26, 27 but also to the share plate 2 at 32and to the supporting plate 15 at 33. In the case of excessive wear theinserts 25 or the end portions 25' or individual ones thereof can be cutwith a cutting torch from the plow at the seams 31, 32, 33 (Figs. 5 and6) and may be replaced by new inserts or end portions.

The intermediate rail portions 26, 27, which define the slots 7 andconnect the inserts 25 to each other and to the end portions 25', arenot so highly stressed by the reciprocating sections 3 as the insertsand for this reason are made of material of lower strength than theseinserts. The intermediate rail portions 26, 27 are connected by weldedseams 34 to the rib plates 8, by welded seams 35 to the share plate 2and by welded seams 36 to the supporting plate 2 and by welded seams 37to the pocket members 4. These welded seams are apparent from Figs. 4 to8, which show also the welded seam'38 connecting the share plate 2 tothe rib plates 8, the welded seam 39 connecting the supporting plate 15to the vertical ribs 8, and the welded seams 40 connecting the pocketmember 4 to the rib plates.

- To faciltate the connection of the share plate 2, the plates whichcarry the pocket members 4, and the supporting plate 15 to theintermediate rail portions 26, 27 the latter carry extensions 41, whichextend rearwardly beyond the rear ends of the inserts 25 and endportions 25 and engage them from behind. Those portions of theextensions 41 which engage the inserts 25 and end portions 25 frombehind extend suitably as far as to the boundary planes of the web ofthe inserts or end portions 25 and 25' and, thus, as far as to the ribplates 8.

I claim:

1. A snow plow comprising a plow frame, guide pocket members carried bysaid plow frame and having front rims, a plurality of clearing edgesections in guided engagement with said guide pocket members, resilientmeans tending to urge said sections forwardly out of said guide pocketmembers, and a steel rail arranged to reinforce said front rims andformed with slots aligned with said guide pocket members to formpassages and guides for said sections, said rail comprising I-shapedinserts consisting of high-grade steel and forming side edges of saidslots in engagement with said sections, intermediate rail portions ofsteel of lower strength, which intermediate rail portions define top andbottom edges of said slots and connect said inserts, and channel-shapedend portions at both ends of said rail, said inserts, intermediate railportions and end portions having fiat contact surfaces and the insertsand end portions engaging said intermediate rail portions at saidcontact surfaces, said inserts and end portions having bevelled edges atsaid contact surfaces thereof and said intermediate rail portions havingsharp edges at said contact surfaces thereof, which sharp edges definewedge-shaped grooves with said bevelled edges for accommodating a weldbead.

2. A snow plow as set forth in claim 1, which comprises a share plateand a bottom supporting plate, both of which are connected to the plowframe, said inserts and end portions being welded to said share plateand said supporting plate.

3. A snow plow as set forth in claim 1, in which said plow framecomprises rib plates arranged between said bladelike sections and thelatter have a web equal in thickness to said rib plates.

4. A snow plow as set forth in claim 1, which comprises a share plateand a bottom supporting plate, both plates being connected to the plowframe, said plow frame comprising rib plates and carrying said pocketmembers, said intermediate rail portions being connected to the shareplate, the supporting plate, the rib plates and the pocket members.

5. A snow plow as set forth in claim 1, which comprises a lowersupporting plate, a share plate, rib plates forming parts of said plowframe, and connected to said share plate, said lower supporting plate,and pocket members, said intermediate rail portions carrying extensionsto which said share plate, supporting plate and pockets are connected,said extensions extending beyond said inserts, said inserts having a webengaged by said extensions.

References Cited in the file of this patent UNITED STATES PATENTS1,981,992 Curtis Nov. 27, 1934 2,116,351 Jones et al. May 3, 19382,751,831 Null June 26, 1956 2,844,416 Zaveruha July 22, 1958 FOREIGNPATENTS 173,720 Germany Jan. 26, 1953

